Harry breathed deeply for a few moments in an effort to steady himself. It did not work.
“Well, I don’t!” he said, as loudly as before. “He’s up to something with Draco Malfoy right now, right under your nose, and you still—”
“We have discussed this, Harry,” said Dumbledore, and now he sounded stern again. “I have told you my views.”
“You’re leaving the school tonight and I’ll bet you haven’t even considered that Snape and Malfoy might decide to—”
“To what?” asked Dumbledore, his eyebrows raised. “What is it that you suspect them of doing, precisely?”
“I… they’re up to something!” said Harry and his hands curled into fists as he said it. “Professor Trelawney was just in the Room of Requirement, trying to hide her sherry bottles, and she heard Malfoy whooping, celebrating! He’s trying to mend something dangerous in there and if you ask me he’s fixed it at last and you’re about to just walk out of school without—”
“Enough,” said Dumbledore. He said it quite calmly, and yet Harry fell silent at once; he knew that he had finally crossed some invisible line. “Do you think that I have once left the school unprotected during my absences this year? I have not. Tonight, when I leave, there will again be additional protection in place. Please do not suggest that I do not take the safety of my students seriously, Harry.”
“I didn’t—” mumbled Harry, a little abashed, but Dumbledore cut across him.
“I do not wish to discuss the matter any further.”
Harry bit back his retort, scared that he had gone too far, that he had ruined his chance of accompanying Dumbledore, but Dumbledore went on, “Do you wish to come with me tonight?”
“Yes,” said Harry at once.
“Very well, then listen.”
Dumbledore drew himself up to his full height.
“I take you with me on one condition: that you obey any command I might give you at once, and without question.”
“Of course.”
“Be sure to understand me, Harry. I mean that you must follow even such orders as “run”, “hide” or “go back”. Do I have your word?”
“I—yes, of course.”
“If I tell you to hide, you will do so?”
“Yes.”
“If I tell you to flee, you will obey?”
“Yes.”
“If I tell you to leave me, and save yourself, you will do as I tell you?”
“I—”
“Harry?”
They looked at each other for a moment.
“Yes, sir.”
“Very good. Then I wish you to go and fetch your Cloak and meet me in the Entrance Hall in five minutes’ time.”
Dumbledore turned back to look out of the fiery window; the sun was now a ruby-red glare along the horizon. Harry walked quickly from the office and down the spiral staircase. His mind was oddly clear all of a sudden. He knew what to do.